Reinforcing-bar for concrete construction.



J. V. JENKINS. RBINFOROING BAR FOR OONORETE CONSTRUCTION.

APPLICATION FILED NOV. 22, 1907.

Patented Nov. 24, 1908.

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J. V. JENKINS.

REINFORGING BAR FOR CONCRETE CONSTRUCTION.

APPLICATION FILED NOV. 22, 1907.

Patented Nov. 24, 1908.

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.TOHN v. .TENKINS, or WIOHITA, KANSAS.

REINFORCING-BAR FOR CONCRETE CONSTRUCTION.

To all whom it may concern:

Be it known that I, JOHN V. JENKINS, a citizen of the United States,residing at Vichita, in the county of Sedgwick and State of Kansas, haveinvented certain new and useful Improvements in Reinforcing- Bars forConcrete Construction, of which the following is a specification.

My invention relates to bars for reinforced concrete and among theobjects in view is to provide an improved form of bar which is adaptedto give increased strength to the concrete, provide a better bondtherefor, and overcome all danger of splitting of the concrete.

A further object is to provide an improved bar for the purposementioned, which will be economical in its construction and with thevarious objects in view.

The invention consists in the novel construction of the bar ashereinafter fully described, illustrated in the drawing, and pointed outin the appended claims.

In the drawing :Figure 1 is an elevation showing a portion of two barsconstructed and combined in accordance with my invention. Fig. 2represents a portion of one of the bars showing longer loops than thoseseen in Fig. 1. Fig. 3 is a view similar to Fig. 2, showing still longerloops. Fig. t represents in detail one of the diagonally arrangedconnecting bars or hooks. Fig. 5 is a detail view showing the ends oftwo adjacent bars connected or spliced to gether. Fig. 6 shows a portionof two bars constructed and combined for use in concrete archconstruction.

In carrying out my invention, I provide a bar A composed of twoindividual wires or rods a, which wires or rods are twisted together atintervals as indicated at b, the twisted portions being separated bynont'wisted portions spread apart to form loops (1. Thus the twistedportions and the loops alternate throughout the length of the bar. Bytwisting the two rods or bars together, great strength is obtained,which is not socured by the ordinary straight rod or bar, and byproviding the loops, a better bond is obtained than could be obtainedbya straight bar andfurthermore these loops avoid all danger ofsplitting of the concrete.

The loops 0 may vary in length and in Fig. 2 I show the loops as beingsomewhat longer than those seen in Fig. 1, while in Fig. 3 I show theloops as being somewhat Specification of Letters Patent.

Application filed November 22, 1907.

Patented Nov. 24, 1908.

Serial NO. 403,350.

longer than those seen in Fig. 2, and I do not wish to be restricted toany particular size of loop.

IVhile the bar A so far described could be used in concreteconstruction, yet I preferably employ a construction wherein at leasttwo of the bars hereinbefore described, are combined for cooperation,these bars being connected by suitable connecting hooks or braces.

In Fig. 1 I show two of the bars A, arranged parallel to each other andthese bars A are connected by connecting shear bars or braces B and C.The shear bars B are hooked at their opposite ends and engage the loops0 of the bars A, while the shear bars C are also hooked at opposite endsand engage the said loops c, but these shear bars C are arrangeddiagonally as seen in Fig. 1. The shear bars B and C serve to maintainthe bars A at the desired distance apart, and at the same time serve toprovide additional bonding and strengthening means for the concrete. Byproviding the braces B and C with hooks at opposite ends, the attachmentof said braces to the reinforcing bars A is facilitated.

IV hen it is desired to connect or splice together several of the barsA, the adjacent ends thereof are constructed to provide loops (Z whichengage with each other as seen in Fig. 5.

It will be noted that by the construction represented in Fig. 1, it ispossible to com bine additional bars A with the bars A seen in saidfigure, by using additional shear bars B and 0 arranged as in Fig. 1, toconnect the various hooks A together.

My invention is adapted for use with concrete arch constructions byshortening the successive bars B, beginning at the base of the arch andextending to the highest point thereof whereby the bars A will be madeto approach closer together as they near the highest point of the arch,as seen in Fig. (3.

I would state that I do not wish to be restricted to any particular sizeof wires or rods as I may use all sizes thereof as may be found suitableor convenient.

\Vhat I claim is l. The combination with a plurality of reinforcing barseach comprising a plurality of wires or rods, twisted together atintervals and spread apart intermediate the twisted portions to formloops, of shear bars arranged diagonally mtermediate the reinforcingbars and each provided with hooks 3 at opposite ends which engage withthe loops of the reinforcing bars.

2. The combination with a plurality of reinforcing bars each comprisinga plurality of wires or rods twisted together at intervals and spreadapart intermediate the twisted portions to form loops, of shear barsarranged diagonally intermediate the reinforcing bars and each providedwith hooks at opposite ends which engage with the loops of thereinforcing bars, and shear bars ar ranged right-angularly to andbetween the reinforcing bars and provided at opposite ends with hookswhich engage with the loops of the reinforcing bars.

3. The combination with a plurality of reinforcing bars each comprisinga plurality of wires or rods twisted together at intervals and spreadapart intermediate the twisted portions to form loops, of shear barsvarying in length arranged diagonally intermediate the reinforcing bars,and each pro vided with hooks at opposite ends which engage with theloops of the reinforcing bars.

In testimony whereof I ai'fiX my signature in presence of two witnesses.

JOHN V. JENKINS.

Vitnesses C. H. PAPES, Mrs. H. O. FosTER.

